With the development of cloud storage technology，the cloud storage platforms meets the storage and management requirements of big data. However，when the amount of data and the number of users are further expanded，the system performance requirements of cloud storage are gradually improved，and the data storage management technology in the current cloud storage environment needs to be deeply researched and improved. Considering that the application of the actual cloud storage cluster for optimization research is very vulnerable to the platform environment，this paper implements a hierarchical cloud storage simulation model named TCSS in CloudSim，while implements a three-level hierarchical organization structure of storage devices，then the functional structure such as data I/O service processing and data storage management has been established. In this paper，all the extended function modules have been integrated into the CloudSim layer of the CloudSim simulation tool. Based on the given TCSSmodel，Users can complete the modeling and testing of the cloud storage optimization strategy proposed by themselves.